Make context register implicit for CallInterfaceDescriptors

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index 428874d98584c9cf7cd9c4809f4b635a2b4daa1f..71f91e1ba2159ab128af3df3a180e89869a2fd83 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -112,15 +112,15 @@ void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm,
   isolate()->counters()->code_stubs()->Increment();
 
   CallInterfaceDescriptor descriptor = GetCallInterfaceDescriptor();
-  int param_count = descriptor.GetEnvironmentParameterCount();
+  int param_count = descriptor.GetRegisterParameterCount();
   {
     // Call the runtime system in a fresh internal frame.
     FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
     DCHECK(param_count == 0 ||
-           r0.is(descriptor.GetEnvironmentParameterRegister(param_count - 1)));
+           r0.is(descriptor.GetRegisterParameter(param_count - 1)));
     // Push arguments
     for (int i = 0; i < param_count; ++i) {
-      __ push(descriptor.GetEnvironmentParameterRegister(i));
+      __ push(descriptor.GetRegisterParameter(i));
     }
     __ CallExternalReference(miss, param_count);
   }